Jar.



No. 768,115. h PMEBNTED AUG. 23, 1904.

' J.s. DU BOIS.

" JAR.

APPLIGATION FILED JULY 23, 1903.

N0 MODEL.

QW hwooao Wozu,

MMM 9a. 5b Mw lcap or cover when desired. Y

Patented August 23, 1904. Y

PATENT Orients,

JOSIAH AS. DUBOIS, OF OAMDEN, NEW dERSY.

JAR.

SPECIFICATION forming part of Letters Patent No. 768,115, dated August 23, 1904.

Application l'ed July 23, 1903. Serial No. 166,706. (No model.)

To all whom, 712i 7uur/y concern:

Be it known that I, J osiAi-i S. DU Bois, a citizen of the United States, residing at Camden, in the county of Camden and State of New J ersey, have invented certain new and useful Improvements in J ars, of which the following is a specification.

One object of the invention is to provide a l simple, inexpensive, and efficient' closure for jars mainly intended for the reception and ensealing of preserved fruits and the like 'substances, said closure acting solely by the pressure of the atmosphere.

Another object is to provide means'whereby the vacuum which causes the sealing may be readily broken to permit the removal of the A further object is to provide an immerse for the preserved fruits or substances to act in conjunctionl with the cap or cover and means to prevent the accidental displacement of saidv immerser when the jar is tilted or turned upside down.

With these and other objects hereinafter referred to the invention consists in the improvements hereinafter described and claimed.

The nature, characteristic features, and scope of the invention will be more readily understood from the following description, taken in connection with the accompanying drawings, forming a part hereof, wherein# Figure lis a perspective view of a jar provided with a closure embodying my improvements. Fig. 2 is a vertical sectional view of the same. Fig. 3 is a bottom perspective view of the cap or-cover, and Fig. tis a top perspective view of the immerser.

1 indicates the jar, which may be of any suitable shape desired. The jar is provided near itsA open end with an Ainternal circumferential ledge or ring-seat 2, which su pports the packing-ring and the cap or cover, said ledge or seat merging into the vertically-extending rim or flange 3 of the jar. The rim or iiange 3 is of a height substantially equal to the,

thickness of the edge of the cap or cover.

Beneath the ledge or seat 2 is an annular shoulder or offset 1, which supports the immerser. The latter is indicated at 5, and, as

clearly shown in Figs. A2 and 4t, it is provided on its upper side with a centrally-disposed cup or socket 6 and near its periphery with aper` tures 7, which latter are for the purpose of giving free passage to the preserving syrup or Huid.

8 indicates the cap or cover having its edge` extended vertically, as at 9, and connected by the transverse rib 10. The lower annular edge of the cover is reduced, as at 11, leaving the downwardly-extending portion 12 of the cover slightly'smaller than the mouth of the jar and presenting sharp edges to engage and bind the packing-ring.

13 indicates a downwardly-directed projection of the cover,which enters the cup or socket 6 of the immerser and cooperates with said cup to maintain a suitable space between the cover and immerser and also to prevent the accidental displacement of the immerser when the jar is tilted orturned upside down. It will be apparent that this arrangement might be reversed-that is to say, the projection lmight he provided on the immerser and the cup or socket on the cover.

14; indicates a rubber packing-ring or gasket which rests upon the ledge or seat 2, and when i the cap or cover is applied engages the sharp edges of the reduced or cut-away portion 11 f The sealing of the jar may be accomplished by the aid of heat and then effecting a reduction in pressure in the jar by'permitting the contents thereof to cool. I prefer, however, to employ the sealing apparatus described in United States Letters Patent No. 553,976, granted to me February 4, 1896. In said apparatus a main receptacle is employed provided with an air-tight cover and otherwise made impervious to the atmosphere, so that a vacuum or partial vacuum may be maintained within the said receptacle for any given period of time. The Jars are introduced into said receptacle with their covers resting upon the packingring or gasket 14. When the exhaustion of the jar is complete,`the pressure of the atmosphere crowds the gasket 111 down tightly upon the ledge 2 and around the reduced portion of the cover, thus preserving the vacuum.

When it is desired to break the vacuum in IOO order to remove the cap or cover, the jar may either be heated or an awl or other pointed instrument may be inserted through a recess l5, provided in the periphery of the cap or cover, and said instrument caused to penetrate the packing-ring or gasket let, so as to permit the entrance of air.

It will be obvious to those skilled in the art to which theinvention relates that modilications may be made in details without departing from the spirit and scope of the same. Hence I do not limit myself to the precise construction and arrangement of parts hereinbefore described and illustrated in the accompanying drawings; but,

Having described the nature and objects of the invention, what I claim as new, and desire to secure by Letters Patent, is-

l. rlhe combination of a jar having an upwardly-directed external flange and an internal ledge or seat, a packing-ring resting on said ledge, and a cover having its bottom slightly reduced to provide sharp edges which engage said packing-ring and constitute therewith a hermetic seal, said cover having a peripheral recess to permit the insertion of an instrument for breaking the seal, substantially as specified.

2. The combination of a jar having its throat provided witha ring-seat and with an annular shoulder or oll'set below the same, an immerser resting on the offset, a packing-ring disposed on the ring-seat, a sealing-cap having its bottom reduced to provide sharp edges which engage said packingring under atmospheric pressure and constitute therewith a hermetic seal, said cap having a peripheral recess whereby the packing-ring is accessible to means capable of destroying the seal, and means to prevent the accidental displacement of the immerser, substantially as described.

3. The combination with a jar having an upwardly-extending external flange, an internal ledge or seat, and an oilset or shoulder below said ledge, a packing-ring resting upon the ledge, an immerser restingupon theoll'setand having its top provided with a cup or socket, and a cap or cover having its bottom reduced to provide sharp edges which engage the packing-ring under atmospheric pressure, said cap having a downwardly -directed projection which enters said cup or socket and prevents the accidental displacement ol'l the immerser, substantially as specilied.

4. The combination of a ljar having an upwardly-directed external flange and an internal ledge or seat, a packing-ring resting upon said ledge, and a cover having its bottom slightly reduced to providesharpedgeswhich engage said packing-ring under atnmspheric pressure and constitute therewith a hermetic seal, said cover having its outer edge vertically extended and connected by a transverse rib, substantially as specilied.

5. The combination of a cap and an immerser, whereof one is provided with a cup or socket and whereof the other is provided with a projection adapted to enter said cup or socket and prevent the accidental displacement of the immer-ser, a jar having an encircling rim and ollsets to accommodate the cap and immerser, and a packing-ring against which the cap is held by atmospheric pressure, said cap having its bottom reduced to provide sharp edges which engage the packing-ring and also having a peripheral recess whereby the packing-ring is accessible to means capable of destroying the seal, substantially as described.

In testimony whereof l have hereunto signed my name in the presence of two su bscribingl witnesses.

JOSIAH S. DU HUIS. Vitnesses:

W. J. JAoksoN, K. M. RICHMOND. 

